federico@korobushka 
~/programacion/jruby
$ mspec ci
jruby 1.1.3 (ruby 1.8.6 patchlevel 114) (2008-07-21 rev 7252) [i386-java]
/usr/local/lib/ruby/gems/1.8/gems/mspec-1.4.0/lib/mspec/commands/mspec-ci.rb:55:in `run': No such file or directory - No such file or directory - /Users/federico/programacion/jruby/spec/ruby/1.8/core (Errno::ENOENT)
  from /usr/local/lib/ruby/gems/1.8/gems/mspec-1.4.0/lib/mspec/commands/mspec-ci.rb:55:in `each'
  from /usr/local/lib/ruby/gems/1.8/gems/mspec-1.4.0/lib/mspec/commands/mspec-ci.rb:55:in `run'
  from /usr/local/lib/ruby/gems/1.8/gems/mspec-1.4.0/lib/mspec/utils/script.rb:86:in `main'
  from /usr/local/lib/ruby/gems/1.8/gems/mspec-1.4.0/bin/mspec-ci:8